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Operation GAC (Silverado Tuning) #470

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560d9aa
silverado
firestar5683 Jan 27, 2026
b4cec3e
Update interface.py
firestar5683 Feb 1, 2026
1cc2aeb
quant
firestar5683 Feb 2, 2026
1948048
Update interface.py
elkoled Feb 2, 2026
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6 changes: 3 additions & 3 deletions opendbc/car/gm/interface.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@
NON_LINEAR_TORQUE_PARAMS = {
CAR.CHEVROLET_BOLT_EUV: [2.6531724862969748, 1.0, 0.1919764879840985, 0.009054123646805178],
CAR.GMC_ACADIA: [4.78003305, 1.0, 0.3122, 0.05591772],
CAR.CHEVROLET_SILVERADO: [3.29974374, 1.0, 0.25571356, 0.0465122]
CAR.CHEVROLET_SILVERADO: [3.8, 0.81, 0.24, 0.0465122]
}


Expand Down Expand Up @@ -53,10 +53,10 @@ def torque_from_lateral_accel_siglin_func(lateral_acceleration: float) -> float:
# This has big effect on the stability about 0 (noise when going straight)
non_linear_torque_params = NON_LINEAR_TORQUE_PARAMS.get(self.CP.carFingerprint)
assert non_linear_torque_params, "The params are not defined"
a, b, c, _ = non_linear_torque_params
a, b, c, d = non_linear_torque_params
sig_input = a * lateral_acceleration
sig = np.sign(sig_input) * (1 / (1 + exp(-fabs(sig_input))) - 0.5)
steer_torque = (sig * b) + (lateral_acceleration * c)
steer_torque = (sig * b) + (lateral_acceleration * c) + d
return float(steer_torque)

lataccel_values = np.arange(-5.0, 5.0, 0.01)
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2 changes: 1 addition & 1 deletion opendbc/car/torque_data/override.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@ legend = ["LAT_ACCEL_FACTOR", "MAX_LAT_ACCEL_MEASURED", "FRICTION"]
"CADILLAC_ESCALADE_ESV_2019" = [1.15, 1.3, 0.2]
"CADILLAC_XT4" = [1.45, 1.6, 0.2]
"CHEVROLET_BOLT_EUV" = [1.0, 2.0, 0.175]
"CHEVROLET_SILVERADO" = [1.9, 1.9, 0.112]
"CHEVROLET_SILVERADO" = [2.014, 1.9, 0.125]
"CHEVROLET_TRAILBLAZER" = [1.33, 1.9, 0.16]
"CHEVROLET_TRAVERSE" = [1.33, 1.33, 0.18]
"CHEVROLET_EQUINOX" = [2.5, 2.5, 0.05]
Expand Down